Here is a "SilentSwitcher" with USB PD support. The board has a STUSB4500Q USB PD controller that can work as stand-alone USB PD sink. Otherwise the board is similar to Jan's original SilentSwitcher. High voltage output has slightly higher current capability (+/-15V@250mA) and LDOs are LT3045/LT3094. Max input voltage of the board is 16V.
Many modern power banks now offer higher voltage output through USB PD (e.g. 5V@3A, 9V@2A, 12V@1.5A). This is very useful for these switcher boards as full output (+/-15V@250mA, 5V5@800mA) at 5V input leads to very high startup currents (>2A). Many mobile power banks are not up to such high currents. With higher input voltage the startup currents are much smaller so full output is possible even from smaller power banks.
STUSB4500Q can be configured via I2C. I've set the USB PD PDOs (Power Data Objects) at 5V@2.5A, 12V@1.5A, 15V@1A. These should work with most mobile power banks. The board can of course be used without USB PD.
Many modern power banks now offer higher voltage output through USB PD (e.g. 5V@3A, 9V@2A, 12V@1.5A). This is very useful for these switcher boards as full output (+/-15V@250mA, 5V5@800mA) at 5V input leads to very high startup currents (>2A). Many mobile power banks are not up to such high currents. With higher input voltage the startup currents are much smaller so full output is possible even from smaller power banks.
STUSB4500Q can be configured via I2C. I've set the USB PD PDOs (Power Data Objects) at 5V@2.5A, 12V@1.5A, 15V@1A. These should work with most mobile power banks. The board can of course be used without USB PD.
That looks great. I asked Jan a few months back if his was still available and it was not. Yours look like another more up-to-date alternative. Do you plan to make these available in some form?
I have not yet decided. Component and manufacturing costs make small batches economically not very feasible.
The additional current and voltage capability would make it ideal to power the Marsh HPA.
With the post-regulators LT3045/LT3094 noise, PSRR, Z out probably very similar to Jan's version.
Keep us posted.
With the post-regulators LT3045/LT3094 noise, PSRR, Z out probably very similar to Jan's version.
Keep us posted.
Here is loopback measurement of my AK4493 DAC and ES9822PRO ADC both powered from this "SilentSwitcher". What is noteworthy is that the "SilentSwitcher" is in this case powered from the mains (50Hz) via a linear "wall wart" PSU. So no power bank or battery used.
Attachments
I've been privvy to some units from Martti (without the PD feature), and I can attest it is very quiet, quieter than my originals.
Hope he can be persuaded to have a bunch build!
Jan
Hope he can be persuaded to have a bunch build!
Jan